Designs
Name two disadvantages of a repeated-measure design
What is
1. massive carryover
2. very complex procedures
The total degrees of freedom always reflects...
the total number of scores in the data (N-1)
The definition of individual differences
What is "differences between people on the dependent variable which are not from the independent variable"
Are ANOVA's 1-tailed or non-directional
What is both
Sum of Squares df MS F
BG 122.722 1 122.722 5.72
WG 343.556 16 21.472
total 466.278 17
Name N, and if we reject or retain with the crit F= 4.49
What is Subjects
Name two advantages of a repeated measures design
What is
1. more statistical power
2. fewer participants needed
In SPSS what will appear on "Mean Difference (I-J)" if the mean difference is significant
What is an asterisk
If Ho is true, what should F equal
What is 1
Fill in the missing pieces of the chart:
SS df MS F p
Between 25.81 2 .000
Subjects 16.286 2.714
Within 4.857 12 .405
Between: 12.905, 31.882
Subjects: 6
In a repeated-measures design, how do you calculate F with the Subjects, Between and Within Means Squared
What is Between MS/ Within MS
Which is more powerful, a repeated-measures design or a between-subjects design?
What is a repeated-measures
In general, the distribution of F-ratios is:
a. positively skewed with all values greater than or equal to zero
b. symmetrical with a mean equal to df between
c. negatively skewed with all values greater than or equal to zero
What option a
If Ho is false, what should F should be _____ than 1.00
What is greater, >
Fill in the blanks:
SS df MS F p
Between 365.87 2 182.93 <.001
Subjects 2334.90 80.51
Within 256.13 58
Between: 41.42
Subjects: 29
Within: 4.42
When calculating the df in a repeated-measures ANOVA how do you get the within df
"Thie advantage (in regards to repeated-measures vs between-subjects) of statistical power is always offset by..."
What is CARRYOVER
If the F-ratio for a repeated-measures ANOVA, what happens to variability caused by individual differences?
a. it automatically gets eliminated from both the numerator and the denominator
b. must be computed and subtracted out of the numerator and the denominator
c. is automatically eliminated from the denominator but must be computed and subtracted out of the numerator
d. is automatically eliminated from the numerator but must be computed and subtracted out of the denominator
For a repeated-measures ANOVA, which of the following is computed differently, compared to an independent-measures ANOVA
What is the denominator of the F ratio
Fill in the blanks:
SS df MS F p
Between 382.333 3 <.001
Within 123.00 20
Between: 127.444, 20.723
Within: 6.150
Name all of the inputs needed to calculate a within-group design (remember the circles)
What is: total df, BG df, WG df, subjects df, and error df
Name how repeated-measures ANOVA increases statistical power
What is by removing subject's variance from within-group variance
Compared to an independent-measures design, a repeated-measures study is more likely to find a significant effect because it reduces the contribution of variance due to
What is individual differences
If a randomized ANOVA, there are four groups with 15 participants in each group, then the df for the F-ratio is equal to
a. 60
b. 56
c. 3, 56
d. 4,59
Fill in the blanks:
SS df MS F
Between 15 4
Subjects 25 10
Within 25
What is the total df? What is N?
Between: 3.75, 6
Subjects: 2.5
Within: 40, .065
Total df: 54
N:55